Ok I'm slow, drained all fluids...this is what I've found. I have a broken valve spring on #6 cylinder. I live in small town; ie no one wants to touch it. One mechanic kept car for 3+ weeks and charged $1200 for diagnostic and couldn't tell me the valve spring was broken. Any ideas would be appreciated; I have CD and am mechanically inclined; just a little OCD in that everything I move or touch on car is labeled and diagrammed.